Abrading device



Aug.23, 1938. s I F. POSTMA 2;1127,528'

'ABRADING DEVICE Fil ed Nov. 5, 1937 2 Sheets-Sheet 1 I F. POSTMA ABRADING DEVICE Filed Nov. 5, 1937 2 Sheets-Sheet 2 27cm /c J 0s777w,

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a the same abrading operation, means being prothereto as i U:

Patented Aug. 23, 1938 I v I UNITED STATES PATENT UFF'ICE 2,127,528 e ABRAD'ING nEvIoE I Frank Postrna, Ridgewood, N, J. t t Application November 5, 1937, "Serial No. 173,014

5 oi'si s. 1,51 ,264) This invention relates to ahrading devices, of the 's ections of the abrading liner shown in has more particular reference ton ove'l and 'effiu es 1 to 4 inClusive.

cient rneans for carrying out the abrading rnethod g re 6 is a perspective view of one section v generailydisclosed in mvcopending application he a edi ,linr a p and connecting rod 5 Ser. No. 164,390, filed September 17,1937, inccnbearing in sia 1 5 nection with the crank journals of the oranke Figure a. Pe s e ew the eth shaft of a engine of t v ty' wh' rih the section of said abra'ding liner clamp and bearbearings of two connecting rods are engaged mg s a n means with each crank journal of the'engine crank- Ref r in detail to h draw n shaft, I indicate upwardly diverging transversely alined The primary object of the present'invention is Whee a ng th yy i whi 'er to, provide. an abrading device of the above kind reeiplocable the P s sand Behav n qqm ct including an abradihg liner of the type disclosed 9 ed Te v ed at theirebwer nd in my co-pending application Ser. No 164,389, Wit h c a ar g een 9-1 is p 1 3* filed September 1'7, 1937, arranged to engage in t ein the eenheefing' d n s 8 and 8 the bores of the bearings of both connecting rods e e n W h e r k e n engaged with ajcrank journal of the crankshaft e ifi n in cr k haft ll}, each pe rin con of an engine of the V-type for abrading said e et of a. bearing, 9 i e with P 9 journal throughout the length thereof in one and meeting red and eme? bearing b t d I Theorank journal 9 is of a vided to effectively support and clamp theabrade ehel $9 6; a th C m ed, W d s ing linersections together between the bearings Pe of h beer s sfiand .5 te rof the connecting rods and to space the connectees 8 a e ma P e W 3 b er ing rod hearings so, that they will properly sur nenerewh a e amp in place by the'bolts it round and back the abrading liner sections at @Ulfi d whi h. ieetetb hS .e he the ends of the latter. i a res ve h a s to spa e the 1 tt rfr meaeh A further object of the present invention is 'to ,th end, the h e e h e d of h 3 3'" provide means for keying the abrading linerto P 9 normal} O e n of ne- It the clamp. which clamps the abrading liner vsec- Wfll'i e p en that defi le r 3G tioiisinterrnediate their ends andspaces the hearwas w l b h wee t e bearings a 8a ings .of the connecting rods, and meansto re- W e i g, 1iTiers a e ved a d strain said clamp against undue turning i felati ve beefi gr p p t engage f their to one 'of the connecting rod bearings so as to Wat Sides w h the ho l s fin ndsq the thereby prevent complete turning of the abrad- W i J n t l etm clearance as Win ing liner relative to the crankshaft journal. ie e rbe e appa nt-i i .With the above general objects in, view, the 1 accordance w the present invention, an

present invention consists in the novel form, corndm l e f provided for ng, t d n h hiriation and arrangement of parts hereinafter ea ng em fi b onn tin r lcae inure. fully described, shown in the accompanya qe q al e r ps ner t er om iii; in'gdrawings and claimed. c 'alqge i l n r consi ti oi a pair of semi- 40 In the drawings: cylindrical members; each composed of a thin Figure 1 is a fragmentary view, partly in transt h l ad t t a ns he beres verse vertical section, or an engine of the v-type of the'bearings 8 and dh v n secu d or having an abrading device operatively associated PgQ fi i its in a e granular abradirlg 4:5 witha crankshaft journal nd associated cc m ter e ,wbi i k er p n. t an sha t hectihe' rod bearings thereof, said abr'ading de- Journal, 9. This ab d s 9 1 5 f the same vice embodying the present invention. Width lengt a the journal 9 i i ht Figure 2 is an enlarged view looking upwardly i r; 6 l r th nt eeomb W t 0f h at the connecting rodibearingsa'nd' abrading deings {land ta with their, hearing liners revice whenoperatively associated as in Figure 1. moved, when thebearings 8 and 8a are 50 I Fig'ure 3 is a fragmentary vertical section taken spread apart to abut the shoulders at the ends on the plane or line 3-3 of Figure 1 and drawn of the journal hearing, a clearance or space is ona'nenlarged scale, parts being omitted, left 'between the hearings 8 and Baas shown 4 is a'sectich h line 4 t of Figure 3. c eei1 hFie re a n ,3. H 337 sebaratingthe 55 Figure 5 is an enlarged perspective view of one beari'rigs 8 and aw in this way, the abradingliner 55 tated during the abrading operation. For clamping and supporting the intermediate portion of the abrading liner, I provide a narrow clamping ring capable of snugly fitting between the bearings 8 and 8a and about the abrading liner, said clamp being preferably composed of a pair of semicircular members It and I40, having cooperating apertured lugs l5 and I5a at their ends for reception of clamping bolts I6 by which the sections i 4 and Ma are secure-1y fastened in place and together. through the apertured lugs l 5a of section Ma and be threaded into the lugs-l5 of section. l4,as shown. It is also necessary to limit turning of the abrading liner with the journal 9, and for this purpose I provide at least one of the clamp sections with inwardly projecting pins I'i arranged to engage in apertures l8 provided in the associated abrading liner section, one of the clamp sections being provided with laterally projecting lugs I9 arrangedto cooperate with one of the connecting rods to limit turning of the clamp and abrading liner relative to said connecting rod. As shown, the pins I! may be provided on clamp section [4 and the lugs It provided on the clamp section Mia, said lugs l9 being disposed to engage one of the bearings 8 or 8a between the ears and clamping bolts I l of that bearing. Thus, as soon as the crank shaft is rotated, one of the lugs l9 will engage the ear and clamping bolt H of the bearing 8a when the clamp is disposed as shown in the drawings, thereby preventing further turning of the abrading liner relative to said bearing and with the crankshaft journal 9. However, the lugs l9 are spaced a lesser distance apart than the bolts ll at opposite sides of said bearing 8a so that the abrading liner and clamp may be shifted out of the way for permitting ready access to and removal of the bolts H of bearing 8a. when the abrading operation is completed, to permit removal of the abrading liner and clamp when the cap members of the bearings 8 and 8a are detached. It will of course be understood that pins ll need only project into the backing l2 and not into the abrading material l3 for contact with the journal 9. While the pins I I are efiicient for their intended purpose, it is readily possible to provide any other suitable means for keying the clamp to the abrading liner, as well as providing other suitable -means than the lugs I!) for limiting or restraining theabrading liner against complete rotation with the crankshaft journal 9. These are very simple and efficient means, for these purposes, and are at present preferred.

In using the present abrading device, the general abrading method is used as described in my co-pending application Ser. No.'164,390, filed September 17, 193'7. In other words, with the parts assembled as shown in Figures 1 to 4 inclusive, the crankshaft is rotated by suitable means so as to subject the journal 9 throughout its length to the abrading action of the abrading linen. More than one step may be involved in the abrading operation, a coarse-abrasive liner being initially used for truing the journal 9,

The bolts [6 may pass freely and a finer abrading liner being subsequently used to smooth or polish the journal.

From the foregoing description, it is believed that the construction and manner of use as well as the advantages of the present invention will be readily understood and appreciated by those skilled in the art.

What I claim as new is:

1. An abrading device forian engine crankshaft journal which accommodates the bearings of two connecting rods and which allows clearance between said bearings when the bearing liners of the latter are removed, comprising an abrading liner adapted to seat against the bores of bothbearings and to bear upon the crankshaft journal throughout the length of the latter, and means for clamping and supporting said abrading liner between said bearings.

2. An abrading device for an engine crankshaft journal which accommodates the bearings of two connecting rods and which allows clearance between said bearings when the bearing liners of the latter are removed, comprising an abrading liner composed of a pair of semi-cylindrical membersadapted to seat against the bores of. both bearings and to bear upon the crankshaft journal throughout the length of the latter, and means for clamping and supporting said abrading liner between said bearings, said clamping and supporting means comprising coacting semicircular clamp members detachably bolted together.

3. An abrading device for an engine crankshaft journal which accommodates the bearings of two connecting rods and which allows clearance between. said bearings when the bearing liners of the latter are removed, comprising an abrading liner composed of a pair of semi-cylindrical members adapted to seat against the bores of both bearings and to bear upon the crankshaft journal throughout the length of the latter, means for clamping and supporting said abrading liner between said bearings, said clamping and supporting means comprising coacting semi-circular clamp members detachably bolted together, means to key said clamping and supporting means to the bearing liner againstrelative rotation, and means engageable with one of the connecting rods for limiting rotation of the abrading liner relative to the bearing of said one connecting rod.

4. An abrading device for an engine crankshaft journal which accommodates the bearings of two connecting rods and which allows clearance between said bearings when the bearing liners of the latter are removed, comprising an abrading liner composed of a pair of semi-cylindrical members adapted to seat against the bore of both bearings and to bear upon the crankshaft journal throughout the, length of the latter,

means for clamping and supporting said abrading liner between said bearings, said clamping and supporting means comprising coacting semicircular clamp members detachably bolted together, means to key said clampingand supporting means to the bearing liner against relative rotation, and means engageable with one of the connecting rods for limiting rotation of ,the abrading liner relative to the bearing of said one connecting rod, said'abrading liner having apertures, and said keying means comprising inwardly projecting pins engaging in said apertures and carried by one of the clamping members.

5. An abrading device for an engine crankshaft journal which accommodates the bearings of two connecting rods and which allows clearance between said bearings when the bearing liners of the latter are removed, comprising an abrading liner composed of a pair of semi-cylindrical members adapted to seat against the bores ofboth bearings and to bear upon the crankshaft journal throughout the length of the latter, means for clamping and supporting said abrading liner between said bearings, said clamping and supporting means comprising coacting semi-circular clamp members detachably bolted together,

means to key said clamping and supporting means to the bearing liner against relative rotation, and means engageable with one of the connecting rods for limiting rotation of the abrading liner relative to the bearing of said one connecting rod, the means for limiting turning of the abrading liner and clamping means relative to the bearing of said one connecting rod comprising laterally projecting lugs on one of the clamping members engageable with said connecting rod.

FRANK POSTMA. 

